Quarterly report pursuant to Section 13 or 15(d)

Acquisitions - Summary of Final Amounts Preliminarily Allocated to Acquired Assets and Assumed Liabilities (Detail)

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Acquisitions - Summary of Final Amounts Preliminarily Allocated to Acquired Assets and Assumed Liabilities (Detail) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Dec. 31, 2013
Business Acquisition [Line Items]      
Goodwill $ 24,686 $ 20,008 $ 20,031
Jamison      
Business Acquisition [Line Items]      
Prepaid expense 135    
Furniture and equipment 335    
Security deposits 30    
Capital leases (253)    
Deferred rent (19)    
Total fair value of net tangible assets acquired 228    
Goodwill 4,678    
Total purchase consideration 10,706    
Jamison | Customer Relationships      
Business Acquisition [Line Items]      
Intangible asset 5,000    
Jamison | Non-compete Agreements      
Business Acquisition [Line Items]      
Intangible asset $ 800